Reorganize notification Settings classes

The notification package was getting too big.

Test: make -j64 RunSettingsRoboTests
Fixes: 145224451
Change-Id: I25ba82f42f7a137d8adcce72dcf8089d0e018bdc
diff --git a/res/xml/special_access.xml b/res/xml/special_access.xml
index b0d962a..25422bf 100644
--- a/res/xml/special_access.xml
+++ b/res/xml/special_access.xml
@@ -52,7 +52,7 @@
     <Preference
         android:key="zen_access"
         android:title="@string/manage_zen_access_title"
-        android:fragment="com.android.settings.notification.ZenAccessSettings"
+        android:fragment="com.android.settings.notification.zen.ZenAccessSettings"
         settings:controller="com.android.settings.applications.specialaccess.zenaccess.ZenAccessController" />
 
     <Preference